<!DOCTYPE html>
<html>
  <head>
    <script src="./js/vue.js"></script>
  </head>
  <body>
    <h2>Vue 学习</h2>
  </body>
  <script>
    var data = { a: 1 }
    var param = new Vue({
      data: data
    })
    param.a = data.a
    console.log('当前 a 的值为：' + param.a)
  </script>
</html>
